The history of iFixit is good read if you want to hear the sad story about the rise and fall of Apple's laptop keyboards. In short, Apple replaced the comfortable, highly praised keyboard of the MacBook Pro in the fall of 2016 and took over the thin keyboard with butterfly switch that it originally introduced in the small 12-inch MacBook in 201
Apple tried to make the keys more reliable on some revisions of the Butterfly keyboard mechanism, and even after the expiration of the warranty, it ensured that every computer was replaced with this keyboard in case of problems. My own experience with Apple's 13-inch MacBook Pro this year is that the keyboard is now much more reliable than the earlier models I've tried – but it seems the keyboard is inherently flawed.
They have once again turned to the design of a scissor keyboard, which offers more flexibility and easier repair options. If you want to experience the different keyboard designs from Apple in the last few years up close, take a look at the photography at iFixit. We'll be testing the new MacBook Pro soon, but in the meantime, at least you can count on the keyboard to be a big step forward. Now we just have to wait for Apple to bring it into the rest of the MacBook series.